US20010034222A1 - Image capture and processing accessory - Google Patents

Image capture and processing accessory Download PDF

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Publication number
US20010034222A1
US20010034222A1 US09/817,838 US81783801A US2001034222A1 US 20010034222 A1 US20010034222 A1 US 20010034222A1 US 81783801 A US81783801 A US 81783801A US 2001034222 A1 US2001034222 A1 US 2001034222A1
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Prior art keywords
image
imager
selecting
application
data
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US09/817,838
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Alex Roustaei
William Farmilo
Michael McLean
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Symagery Microsystems Inc
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Symagery Microsystems Inc
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Priority to US09/817,838 priority Critical patent/US20010034222A1/en
Assigned to SYMAGERY MICROSYSTEMS INC. reassignment SYMAGERY MICROSYSTEMS INC. ASSIGNMENT OF ASSIGNORS INTEREST (SEE DOCUMENT FOR DETAILS). Assignors: FARMILO, WILLIAM, MCLEAN, MICHAEL, ROUSTAEI, ALEX
Publication of US20010034222A1 publication Critical patent/US20010034222A1/en
Abandoned legal-status Critical Current

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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N1/00—Scanning, transmission or reproduction of documents or the like, e.g. facsimile transmission; Details thereof
    • H04N1/00127—Connection or combination of a still picture apparatus with another apparatus, e.g. for storage, processing or transmission of still picture signals or of information associated with a still picture
    • H04N1/00281—Connection or combination of a still picture apparatus with another apparatus, e.g. for storage, processing or transmission of still picture signals or of information associated with a still picture with a telecommunication apparatus, e.g. a switched network of teleprinters for the distribution of text-based information, a selective call terminal
    • H04N1/00307—Connection or combination of a still picture apparatus with another apparatus, e.g. for storage, processing or transmission of still picture signals or of information associated with a still picture with a telecommunication apparatus, e.g. a switched network of teleprinters for the distribution of text-based information, a selective call terminal with a mobile telephone apparatus
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N1/00—Scanning, transmission or reproduction of documents or the like, e.g. facsimile transmission; Details thereof
    • H04N1/00127—Connection or combination of a still picture apparatus with another apparatus, e.g. for storage, processing or transmission of still picture signals or of information associated with a still picture
    • H04N1/00281—Connection or combination of a still picture apparatus with another apparatus, e.g. for storage, processing or transmission of still picture signals or of information associated with a still picture with a telecommunication apparatus, e.g. a switched network of teleprinters for the distribution of text-based information, a selective call terminal
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N1/00—Scanning, transmission or reproduction of documents or the like, e.g. facsimile transmission; Details thereof
    • H04N1/00127—Connection or combination of a still picture apparatus with another apparatus, e.g. for storage, processing or transmission of still picture signals or of information associated with a still picture
    • H04N1/00281—Connection or combination of a still picture apparatus with another apparatus, e.g. for storage, processing or transmission of still picture signals or of information associated with a still picture with a telecommunication apparatus, e.g. a switched network of teleprinters for the distribution of text-based information, a selective call terminal
    • H04N1/00283—Connection or combination of a still picture apparatus with another apparatus, e.g. for storage, processing or transmission of still picture signals or of information associated with a still picture with a telecommunication apparatus, e.g. a switched network of teleprinters for the distribution of text-based information, a selective call terminal with a television apparatus
    • H04N1/00299—Connection or combination of a still picture apparatus with another apparatus, e.g. for storage, processing or transmission of still picture signals or of information associated with a still picture with a telecommunication apparatus, e.g. a switched network of teleprinters for the distribution of text-based information, a selective call terminal with a television apparatus with a television transmission apparatus, e.g. a videophone, a teletext system or a digital television system
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N1/00—Scanning, transmission or reproduction of documents or the like, e.g. facsimile transmission; Details thereof
    • H04N1/00127—Connection or combination of a still picture apparatus with another apparatus, e.g. for storage, processing or transmission of still picture signals or of information associated with a still picture
    • H04N1/00326—Connection or combination of a still picture apparatus with another apparatus, e.g. for storage, processing or transmission of still picture signals or of information associated with a still picture with a data reading, recognizing or recording apparatus, e.g. with a bar-code apparatus
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N1/00—Scanning, transmission or reproduction of documents or the like, e.g. facsimile transmission; Details thereof
    • H04N1/00127—Connection or combination of a still picture apparatus with another apparatus, e.g. for storage, processing or transmission of still picture signals or of information associated with a still picture
    • H04N1/00326—Connection or combination of a still picture apparatus with another apparatus, e.g. for storage, processing or transmission of still picture signals or of information associated with a still picture with a data reading, recognizing or recording apparatus, e.g. with a bar-code apparatus
    • H04N1/00328—Connection or combination of a still picture apparatus with another apparatus, e.g. for storage, processing or transmission of still picture signals or of information associated with a still picture with a data reading, recognizing or recording apparatus, e.g. with a bar-code apparatus with an apparatus processing optically-read information
    • H04N1/00334—Connection or combination of a still picture apparatus with another apparatus, e.g. for storage, processing or transmission of still picture signals or of information associated with a still picture with a data reading, recognizing or recording apparatus, e.g. with a bar-code apparatus with an apparatus processing optically-read information with an apparatus processing barcodes or the like
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N1/00—Scanning, transmission or reproduction of documents or the like, e.g. facsimile transmission; Details thereof
    • H04N1/32—Circuits or arrangements for control or supervision between transmitter and receiver or between image input and image output device, e.g. between a still-image camera and its memory or between a still-image camera and a printer device
    • H04N1/333—Mode signalling or mode changing; Handshaking therefor
    • H04N1/33353—Mode signalling or mode changing; Handshaking therefor according to the available bandwidth used for a single communication, e.g. the number of ISDN channels used
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N1/00—Scanning, transmission or reproduction of documents or the like, e.g. facsimile transmission; Details thereof
    • H04N1/00127—Connection or combination of a still picture apparatus with another apparatus, e.g. for storage, processing or transmission of still picture signals or of information associated with a still picture
    • H04N1/00281—Connection or combination of a still picture apparatus with another apparatus, e.g. for storage, processing or transmission of still picture signals or of information associated with a still picture with a telecommunication apparatus, e.g. a switched network of teleprinters for the distribution of text-based information, a selective call terminal
    • H04N1/00283—Connection or combination of a still picture apparatus with another apparatus, e.g. for storage, processing or transmission of still picture signals or of information associated with a still picture with a telecommunication apparatus, e.g. a switched network of teleprinters for the distribution of text-based information, a selective call terminal with a television apparatus
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N2201/00—Indexing scheme relating to scanning, transmission or reproduction of documents or the like, and to details thereof
    • H04N2201/0008—Connection or combination of a still picture apparatus with another apparatus
    • H04N2201/007—Selecting or switching between a still picture apparatus or function and another apparatus or function
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N2201/00—Indexing scheme relating to scanning, transmission or reproduction of documents or the like, and to details thereof
    • H04N2201/32—Circuits or arrangements for control or supervision between transmitter and receiver or between image input and image output device, e.g. between a still-image camera and its memory or between a still-image camera and a printer device
    • H04N2201/333—Mode signalling or mode changing; Handshaking therefor
    • H04N2201/33307—Mode signalling or mode changing; Handshaking therefor of a particular mode
    • H04N2201/33342—Mode signalling or mode changing; Handshaking therefor of a particular mode of transmission mode
    • H04N2201/33357—Compression mode
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N2201/00—Indexing scheme relating to scanning, transmission or reproduction of documents or the like, and to details thereof
    • H04N2201/32—Circuits or arrangements for control or supervision between transmitter and receiver or between image input and image output device, e.g. between a still-image camera and its memory or between a still-image camera and a printer device
    • H04N2201/333—Mode signalling or mode changing; Handshaking therefor
    • H04N2201/33307—Mode signalling or mode changing; Handshaking therefor of a particular mode
    • H04N2201/33378—Type or format of data, e.g. colour or B/W, halftone or binary, computer image file or facsimile data

Definitions

  • the invention relates generally to devices for capturing images and more particularly for to an image capture and processing accessory for use with limited bandwidth networks such as wireless networks.
  • “smart cell phones” equipped with a touch screen pen based liquid crystal display (LCD) are well known in the art and may be utilized as a personal digital assistant (PDA) with internet connectivity as well as voice and data transfer capabilities.
  • PDA personal digital assistant
  • the Neopoint 1600, the NokiaTM9000 and pdQTM800 are examples of these phones already on the market.
  • Other accessories like HandspringTM Visor Prism have add-on modules that can turn a PDA into a miniature digital camera.
  • imaging applications such as video phones, digital cameras, video cameras and auto ID/bar code readers, all used as separate devices performing different functions.
  • FIG. 1 shows a cellular telephone, or any other portable wireless communication device with an attachment for capturing images.
  • the cellular phone 10 includes an antenna 11 used for connecting to the wireless network, a display window 12 , keys 13 , a microphone 14 , and speaker 15 .
  • the connection 25 between the image accessory 20 and cellular telephone 10 includes a male connector 26 and female connector 27 or vice versa.
  • the image accessory 20 includes an image sensor 21 , light source 22 for illuminating the image, a viewer 23 for viewing the captured image prior to and after processing, and an activation button 24 for activating the image capture. Note that the viewer, light source, and activation buttons are optional.
  • the image accessory 20 has a direct connection between it and the cellular telephone 10 .
  • This set-up makes it difficult to view and capture an image at the same time.
  • video conferencing one would like to view their own image to make sure it is in the field of view of the image sensor 21 , along with the subject with whom the video conferencing is being held.
  • This preliminary approach to transmitting image data over a network does not address issues of capturing images for different applications. It also does not address other applications such as digital code reading.
  • FIG. 2 shows an example of image capture apparatus 28 that allows the user to select the receiver for captured images.
  • the apparatus contains similar parts as those included in the attachment accessory illustrated in FIG. 1, including an image sensor 21 , an illuminating source 22 , a display window 23 , and an activation button 24 .
  • the accessory further includes selection buttons 29 for selecting the receiver, and an antenna 11 for transmitting the captured image to the intended receiver.
  • the user selects one or more receiving units to which a digital image is to be sent. These receiving units thereby dictate the appropriate image format and/or compression required based on the know capability of the receiving units.
  • the problem with this is that most users do not know the channel availability of their network. Although most dual-mode cellular telephones display to the user the current mode, whether digital or analog, the user is usually unaware of the data transfer capability of the network. The application of this idea is limited to sending the same type of image in different formats. If one were to use the attachment to capture an image that required fall resolution and sent it through a device that would format the image, some or all information could be lost.
  • the bandwidth of third generation cell phones can be as high as 2,048 kilobits per second in a stationary environment.
  • the width of the available channel should determine the size of the image frame being provided by an imager. This type of bandwidth would allow for the transmission of VGA format images (640 pixels ⁇ 480 pixels) at roughly 7 frames per second or CIF format images (320 pixels ⁇ 240 pixels) at 25 frames per second.
  • VGA format image When an imager is capturing still images, a VGA format image is the lowest resolution that is acceptable. VGA resolution will provide an image of sufficient quality for most camera applications. For a scanner that is intended to capture encoded information from a two dimensional bar code stored in today's known optical encoding methods such as Data Matrix, Codabar or PDF417, it is not the resulting mega pixel image that is required, but rather the decoded bar code data.
  • the invention is directed to an imager for capturing and processing images for transmission over a limited bandwidth network.
  • the imager comprises a high resolution CMOS image sensor, an interface for selecting an imaging application and a processor.
  • the processor controls the image sensor to acquire the image data, determines the image format required for the selected imaging application and the limited bandwidth network, processes the image data into the format required and transfers the data to be transmitted.
  • the interface selects either still image applications such as bar code images and photograph images or motion image applications such as permanent video images and video phone images.
  • an imager and a transceiver may be combined into an apparatus for transmitting the processed image data over the limited bandwidth network.
  • the transceiver may be a cellular phone, a digital assist device or an internet appliance for transmitting data over a wireless network.
  • the apparatus may also comprise a buffer that can be integrated on a single chip with the image sensor and the processor, and that temporarily stores image data.
  • a further data storage device may be coupled to the processor for storing data for subsequent transmission.
  • the interface of a self-contained imager may comprise a display window and a number of keys coupled to the processor, while the interface for an imager/transceiver apparatus may comprise a common display window and keypad.
  • the display window and the image sensor may be movable relative to the apparatus as well as to each other, and the processor may control the positioning of the image sensor and the display window.
  • the imager may also include a speaker and a microphone as well as light sources for illuminating a target to be imaged.
  • the imager/transceiver apparatus may be combined into one unit.
  • the sensor and the processor may be located in a first unit and the transceiver may be located in a second unit with a wireless communication link between the first unit and the second unit.
  • Another aspect of the present invention is the method of processing images for transmission over a limited bandwidth network using an imager having a high resolution CMOS image sensor.
  • the method comprises the steps of selecting an imaging application, determining the image format required for the selected imaging application and the limited bandwidth network, acquiring image data in the image sensor, processing the image data into the format required and transferring the data to be transmitted over the network.
  • the imaging applications may be still image applications including bar code images or photographic images, or motion image applications including permanent video images or video phone images.
  • the image sensor acquires the image at a resolution greater than one mega pixel.
  • the sensor image is processed by determining the area in the image containing the bar code, identifying the type of code in the bar code and decoding the code in the bar code.
  • the resultant decoded data may be further compressed.
  • the sensor image is processed by reducing the mega pixel image to a lower pixel image format which may be the VGA format; the reduction process may use windowing, binning or sub-sampling techniques to format the sensor data.
  • the formatted image data may then be further compressed if desired.
  • a sequential series of images is taken at a rate in the order of ten frames per second for permanent videos and seven frames per second for phone videos.
  • the originally acquired images have a resolution greater than one mega pixel.
  • Each of the images is then reduced to a lower pixel format.
  • a phone video image would be reduced the CIF format or the QCIF format, while the permanent video image would be reduced to the VGA format. Format reduction may be achieved using windowing, binning or sub-sampling techniques.
  • the resultant image data may also be further compressed in preparation for transmission.
  • the selection of the imaging application may further cause the sensor to adjust its position to properly image a target.
  • the method may further include the step of determining the available bandwidth in the network.
  • FIG. 1 is a schematic diagram of an accessory for image capture as cited in the prior art
  • FIG. 2 is a schematic diagram of an accessory for choosing a destination receiver as cited in the prior art
  • FIGS. 3 and 4 are schematic diagrams of an embodiment of an imager according to the present invention connected to a transceiver;
  • FIG. 5 is a schematic diagram of an embodiment of an imager/transceiver combination according to the present invention.
  • FIG. 6 is a block diagram of the imager according to the present invention.
  • FIG. 7 is a flow diagram illustrating the process according to the present invention for capturing and transmitting images.
  • FIG. 8 is a flow diagram of the processing of the captured image
  • FIG. 9 is a side view diagram of the image capture system including a movable display window and imager;
  • FIG. 10 is a front view diagram of the image capture system including a movable display window and imager;
  • FIG. 11 is an perspective view of the apparatus in FIGS. 9 and 10 showing the position of the display window on the cellular phone;
  • FIGS. 12 and 13 are perspective and side views of a further embodiment of the image capture system in accordance with the present invention.
  • FIG. 14 is a schematic diagram of the image capture system using a wireless connection.
  • the apparatus and method in accordance with the present invention comprises a versatile comprehensive imager which may be connected to a transceiver device such as a cell phone, a personal digital assistant or an internet appliance for capturing images required for a variety of applications and for transmitting the images over a limited bandwidth network.
  • the imager may be self-contained providing the image signal to be transmitted by the transceiver, or the imager and the transceiver may be combined into a single integrated unit.
  • FIGS. 3 and 4 illustrate an embodiment of a high resolution imager accessory 31 in accordance with the present invention which is associated with a cellular phone 41 .
  • the imager accessory 31 captures either still or motion images and processes the images so that they may be transmitted over a limited bandwidth network through the cellular phone 41 .
  • the imager 31 includes a high resolution image sensor 32 having at least a megapixel array for imaging the target and a light source 33 for illuminating the target.
  • the imager accessory 31 further includes keys 34 for operating the imager 31 , a display window 35 for viewing the captured image, as well as a speaker 36 and a microphone 37 .
  • the imager 31 may be detached from or attached to the cellular phone 41 by a moveable hinge 38 .
  • the cellular phone 41 is a typical unit adapted to transmit and receive voice and data signals over the wireless network and includes a display window 42 , a keypad 43 , an antenna 44 , a speaker 45 and a microphone 46 .
  • FIG. 5 illustrates an imager/cellular phone combination 50 where the imager 51 and the cellular telephone 54 share some of the elements.
  • the cellular phone section 54 includes a display window 52 , a keypad 53 , a speaker 55 , a microphone 56 and an antenna 59 .
  • the keypad 53 is used to perform conventional cell phone 54 controls and is also used as a user interface to control the functions of imager 51 and to select the imager 51 applications.
  • the display window 52 is used to view conventional cellular phone 54 displays and may also be used to view captured images.
  • the speaker 55 and microphone 56 will be used in imager applications such as conference calling.
  • the display window 52 section of the cellular phone may be attached to the body by hinge 57 such that it can be rotated inward as shown.
  • the antenna 59 is used to transmit and receive voice messages over the wireless network and also for transmitting the captured images over the network.
  • Imager 61 includes a high resolution image sensor 62 having a resolution of one or more megapixels, an image processor 64 for controlling the image sensor 62 and for processing the image data, and a buffer 65 for temporarily storing image data.
  • the image sensor 62 , image processor 64 and buffer 65 may be integrated on the same chip.
  • the processor is controlled through an interface 66 which, as described above with respect to FIGS. 3 and 4, is integrated within the imager 31 or, as described with respect to FIG. 5, is an interface shared with the cellular phone 54 .
  • the processor 64 may further control a light source 63 if one is required.
  • Cellular phones do not normally have mass storage capabilities such as disk drives or flash cards, and therefore the inclusion of a data storage device 67 such as a removable flash card to the imager 61 for storing the data created by the imager 61 would be very useful.
  • a data storage device 67 such as a removable flash card
  • added storage for image data could be provided at a web site. Images would be captured by the imager 61 and then transferred by the cell phone to the web site for storage. Such a site could offer still photograph storage, video storage, or even the recording of video conferences. To record a video conference, the user would arrange a multi-party call where one of the parties is the web site's server rather than a participant in the discussion.
  • This web site could also be used as a video message service or “video mail” service. For example, if one party were not to answer the phone, the call would be routed to the web site so that the caller could leave a video message from a live feed or perhaps a pre-recorded video.
  • the imager 61 in accordance with the present invention operates in the following manner as illustrated in FIG. 7.
  • the imager 61 is activated— 71 —which causes the cellular phone to search for a service. Service is normally found automatically and the available bandwidth of the carrier is determined— 72 .
  • the user interface 66 is used to select the desired application— 73 —which may be an application for capturing a still image or a motion image, or again it may be standard cellular phone voice or data application. From the image application selected, the required image format is determined— 74 —since the available bandwidth and the resolution required for that particular image application are known.
  • the imager 61 captures the image— 75 —which is processed— 76 —by the processor 64 .
  • the processor 64 may use a compression software such as JPEG for still images or MPEG for motion images to compress the image for transmission.
  • the image is then sent over the wireless network— 77 —through the cellular phone. If further images are required, as is the case when a video image application has been selected— 73 —the command is sent to the imager to capture a further sequential image— 78 —, otherwise the process is ended— 79 .
  • FIG. 8 illustrates the flow diagram of the factors considered during the processing of a captured image.
  • the imager 61 is capable of megapixel resolution which is required for accurately capturing bar codes, but may not be necessary or even desirable for other image applications.
  • the processor 64 considers whether the image is a still image or a motion image— 82 . Normally, a still image's quality and therefore resolution will be the prime governing factor in its production; whereas in a motion image where a series of images are transmitted sequentially within a limited period of time, the speed of transmission will be the prime governing factor.
  • a still image mode it is a consideration whether it is a bar code or a photograph image— 83 .
  • a bar code will require the processor 64 to maximize the capture by reading out the entire image sensor 62 array at megapixel resolution— 84 .
  • the processor 64 decodes the bar code image— 85 ; this is done by determining which areas in the image contain encoded information, identifying the type of code used to store the information, and finally decoding the stored information. This may be done using the parallel processing method outlined in U.S. Pat. No. 6,123,261 which issued on Sep. 26, 2000 to Roustaei and which is incorporated herein by reference.
  • the processor 64 will therefore decode the bar code— 85 —and compress— 90 —, if necessary, only the decoded information before it is transmitted— 91 .
  • a photograph requires as a minimum a VGA format— 86 —which is a 640 pixel by 320 pixel format. Higher quality may be desirable if the image is to be manipulated and/or enhanced at some future time. Since the sensor 62 is a high resolution megapixel sensor providing the data from every pixel location would provide superfluous data.
  • the desired image format can be produced in a number of different ways. To reduce the amount of data per image to a lower pixel image format, the processor 64 may either read out only certain selected pixels in the image sensor 62 such as by using a windowing or a sub-sampling techniques, or the processor 64 may read out all of the pixels in the image sensor 62 and then manipulate the image data such as by using binning techniques.
  • a CMOS image sensor 62 is ideal for these techniques because of the ability of the sensor 62 to be randomly accessed to specific pixels in the sensor array by the image processor 64 .
  • the processor 64 can read out data from only a portion of the sensor 62 array. For example, an area of 640 pixels by 320 pixels may be readout from the center of a mega-pixel array. In a sub-sampling process, the processor 64 will read out of every n'th pixel. In a binning process, the processor 64 can read out all of the pixels from the sensor 62 and then sum or average groups of pixels into kernels which can effectively provide the amount of data as produced by a 640 pixels by 320 pixels array.
  • the amount of data produced for the image can be scaled down depending on the extent of the sub-sampling while maintaining the quality of image desired, such as a 640 pixels by 320 pixels image format in this case.
  • the sub-sampling technique can result in aliasing artefacts but is simple to implement, while the binning technique which is more complex to implement, avoids the aliasing problem.
  • the photograph data will then be compressed— 90 —, if required, before it is transmitted— 91 . If the photograph data is processed faster then it can be transmitted, it may be temporarily stored in the buffer 65 .
  • a motion image mode it is a consideration whether it is a permanent video or a phone conference video— 87 .
  • a permanent video requires a high level of resolution such as the VGA format— 88 —and preferably produced at a frame rate of at least 10 frames per second.
  • processor 64 will use techniques such as windowing or sub-sampling to capture the images required. Further, the processor 64 may direct a permanent video through compression— 90 —to data storage device 67 for later.
  • a phone conference video required as a minimum a QCIF resolution— 89 at a frame rate of 7 frames per second. Any of the techniques described above may be used by the processor 64 to capture the images at these levels.
  • the resultant video phone data may then be compressed using a conventional compression software— 90 —which may allow the phone video quality to be at a higher level then the minimum acceptable and still be transmitted over the limited bandwidth network— 91 .
  • FIGS. 9, 10 and 11 provide a side view, a front view and a perspective view of a further embodiment in accordance with the present invention.
  • the imager/transceiver 90 includes an imager section 91 and a cellular phone section 101 .
  • the imager 91 includes an image sensor 92 and a light source 93
  • the cellular phone includes a display window 102 , a keypad 103 , a speaker 105 and a microphone 106 and an antenna 109 .
  • the imager 91 is connected by a hinge 98 to one corner of the cellular phone 101 such that it may be rotated in the plane of the phone.
  • the display window 102 is also hinged such that it may be moved perpendicular to the plane of the cellular phone 102 .
  • This allows the user to conveniently point the image sensor 92 at a target while at the same to view the image on the display window 102 .
  • An alternate arrangement would be have the imager 91 swing back perpendicular to the plane of the cellular phone 101 such that the image sensor points away from the user as the user is looking directly at the cellular phone 101 .
  • FIGS. 12 and 13 illustrate an apparatus similar to the one described above.
  • the body of this particular imager/transceiver apparatus 130 is constructed in two sections.
  • the imager section 131 includes an image sensor 132 , a pair of light sources 133 and a speaker 135 .
  • the cellular phone section 141 includes a display window 142 , a keypad 143 , a switch 144 and a microphone 146 .
  • the imager section 131 is hinged to the cellular phone section 141 at the end of arms 136 such that the imager section can be rotated through at least 160 degrees to face away from the front of the cellular phone section 141 as seen in FIG. 13.
  • FIG. 14 shows a further embodiment of an image capture system 120 in accordance with the present invention.
  • the imager 111 is physically separate from the cellular phone 121 having a wireless connection between the two.
  • This wireless connectivity can be provided by a communications link based on the Bluetooth protocol.
  • the imager includes an image sensor 112 , light source 113 , an optional activation button 114 , and an antenna 115 used for a short wireless connection between the imager 111 and cellular phone 121 .
  • the cellular phone 121 includes a display window 122 , a keypad 123 , a speaker 125 , a microphone 126 and an antenna 129 .
  • control signals are transmitted to the imager 111 and image signals are received from the imager 111 for transmission on the wireless network.
  • the antenna 129 is also used to receive and transmit signals on the wireless network.
  • a separate transmitting/receiving unit could be plugged into the cellular phone 121 to communicate with the imager 111 .
  • the imager 31 , 51 , 91 , 131 sense its position relative to the cellular phone 41 , 54 , 101 , 141 in order to determine the application selected by the user. If, for example, the user rotates the imager 31 to a position depicted in FIGS. 3 and 4, the processor in the imager 31 would automatically choose the appropriate resolution and mode for video conferencing. If the imager 91 is positioned as in FIGS. 9, 10 and 11 , the imager 91 would determine that it is being used as a scanner or camera for stills or movies. In a further arrangement, where the application is selected through the keypad, the imager 91 may be made to automatically adjust its position to suit the needs of the user.
  • a head set and microphone connected to the cellular phone or a speakerphone system may be used so that the user does not have to hold the cellular phone directly in front in order to speak into the cellular phone.
  • the imager 31 , 51 , 91 , 111 or 131 would require a connector into which the headset could be plugged.
  • the user usually wants the highest picture quality that can be sent over the limited bandwidth network during the shortest time interval.
  • the present invention provides an imaging accessory that can be connected to a transceiver with the advantage that it allows the user to capture various image formats like optical code, digital stills, or full motion video.
  • the accessory will also allow the cellular phone to operate as a videophone.
  • the present invention is described in conjunction with a cellular phone, the present invention is also applicable to other known forms of transceivers that allow access to a limited bandwidth networks such as landline phones or wireless devices including PDA's or internet appliances.
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